White Pox Disease (IMAGE) University of Georgia Caption White pox disease on a frond of the endangered elkhorn coral on Carysfort Reef in the Florida Keys. White pox disease comes from humans, but when it infects coral, as in this case from the Upper Keys, it causes white blotches by killing the overlying coral tissue and revealing the coral’s white limestone skeleton underneath. Credit James W. Porter, University of Georgia Usage Restrictions Please credit James W. Porter, University of Georgia License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.